CP-violating Phases in Active-Sterile Solar Neutrino Oscillations
Abstract
Effects of CP-violating phases in active-sterile solar neutrino oscillations are discussed in a general scheme of 3+Ns mixing, without any constraint on the mixing between the three active and the Ns sterile neutrinos, assuming only a realistic hierarchy of neutrino mass-squared differences. A generalized Parke formula describing the neutrino oscillation probabilities inside the Sun is calculated. The validity of the analytical calculation and the probability variation due to the unknown CP-violating phases are illustrated with a numerical calculation of the evolution equation in the case of 3+1 neutrino mixing.
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